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Windshield Wiper System Test

WARNING: This page is about a different car, the 1995 Jeep Grand Cherokee. However, it is still accessible from the selected car via links, so may be relevant.
  1. Remove circuit breaker from fuse block module. Turn ignition switch to ACCESSORY or ON position. Measure voltage at battery side of circuit breaker cavity. If meter does not read battery voltage, repair wiring from ignition switch. If meter reads battery voltage, measure resistance across circuit breaker terminals. If meter reads more than zero ohms, replace circuit breaker.
  2. If meter reads zero ohms, unplug wiper switch side of wiring harness connector from intermittent wipe module. Turn ignition switch to ACCESSORY or ON position. Measure voltage at unplugged connector terminal "D". If battery voltage is not present, repair wiring from circuit breaker through multifunction switch connector cavity No. 4. See Fig 1 .
    Fig 1: Identifying Connectors
    G95B27475Courtesy of CHRYSLER CORP.
  3. If battery voltage is present, turn wiper switch to LOW. Measure voltage to unplugged connector terminal "E". If meter does not read battery voltage, repair wiring from wiper switch and/or see WIPER/WASHER SWITCH TEST.
  4. If meter reads battery voltage, turn wiper switch to LOW. Measure voltage to unplugged connector terminal "C". If meter does not read battery voltage, repair wiring from wiper switch and/or see WIPER/WASHER SWITCH TEST.
  5. If meter reads battery voltage, ensure ignition is off and wiring harness connector (multifunction switch side) is still unplugged. Measure resistance between unplugged connector terminals "A" and "G" while rotating wiper switch from minimum to maximum DELAY. If meter does not read zero to 300 k/ohms, repair wiring from wiper switch and/or see WIPER/WASHER SWITCH TEST.
  6. If meter reads from zero to 300 k/ohms, leave ignition off and wiring harness connector (multifunction switch side) unplugged. Measure resistance between unplugged connector terminals "D" and "G" while rotating wiper switch from minimum to maximum DELAY. If meter does not read from zero to 300 k/ohms, repair wiring from wiper switch and/or see WIPER/WASHER SWITCH TEST.
  7. If meter reads from zero to 300 k/ohms, unplug wiring harness connector (wiper motor side) from intermittent wipe module. Turn wiper switch to LOW or HIGH, then plug both unplugged harness connectors into each other. Turn ignition switch to ACCESSORY or ON position.
    CAUTION: DO NOT  move wiper switch to DELAY with intermittent wiper module removed from circuit. If switch is moved to DELAY position during the next step, switch will be damaged.
  8. Test wiper operation in LOW and HIGH speed modes. Test washer operation. If these modes were inoperative, but are okay now, replace intermittent wipe module. If no change, reinstall intermittent wipe module and go to next step.
    CAUTION: When replacing intermittent wipe module, use the correct replacement part. The wrong part will cause incorrect wiper delay.
  9. Turn ignition switch to ACCESSORY or ON position. Turn wiper switch to LOW or HIGH. Measure voltage at either intermittent wipe module connector terminal "F" and move wiper switch to OFF. If meter shows battery voltage until wipers park, then zero volts, go to next step. If meter does not show battery voltage, check wiring to wiper motor then go to next step.
  10. Turn ignition switch to ACCESSORY or ON position. With wiper switch in OFF position, probe motor connector and measure resistance between terminal No. 4 and ground. If meter does not read zero ohms, repair wiring to ground.
  11. If meter reads zero ohms, probe for voltage at terminal No. 1 with wiper switch in any position. If meter does not read battery voltage, repair wiring to intermittent wipe module.
  12. If meter reads battery voltage, measure voltage at terminal No. 5 with wiper switch in LOW position. If battery voltage is present but wipers do not operate, replace wiper motor. If no voltage is present, repair wiring to intermittent wipe module.
  13. With wiper switch in HIGH position, measure voltage at terminal No. 6. If meter reads battery voltage but wipers do not operate, replace wiper motor. If no voltage is present, repair wiring to intermittent wipe module.
  14. With wiper switch in LOW or HIGH position and voltmeter connected to terminal No. 2, turn wiper switch to OFF and observe meter. Meter should read battery voltage when switch goes to OFF, then zero volts after wipers park. If battery voltage is present but wipers fail to park, replace wiper motor. If battery voltage is not present, repair wiring to intermittent module.
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